550331999 has 16 divisors (see below), whose sum is σ = 641399040. Its totient is φ = 462422400.

The previous prime is 550331993. The next prime is 550332011. The reversal of 550331999 is 999133055.

It is a cyclic number.

It is not a de Polignac number, because 550331999 - 2⁴ = 550331983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550331993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163952 + ... + 167274.

It is an arithmetic number, because the mean of its divisors is an integer number (40087440).

Almost surely, 2^550331999 is an apocalyptic number.

550331999 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

550331999 is a deficient number, since it is larger than the sum of its proper divisors (91067041).

550331999 is a wasteful number, since it uses less digits than its factorization.

550331999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3790.

The product of its (nonzero) digits is 164025, while the sum is 44.

The square root of 550331999 is about 23459.1559737344. The cubic root of 550331999 is about 819.4860943149.

The spelling of 550331999 in words is "five hundred fifty million, three hundred thirty-one thousand, nine hundred ninety-nine".